WPEngine support powerful cache functionality. Because of this, you may sometimes have the non-updating issue of website.
To prevent this problems, you need to register specific URL not to cache in WPEngine.
For instance, when you add the WooCommerce plugin to your WP Engine website, WPEngine automatically adds some caching exclusions to ensure your pages work as anticipated. By default, WP Engine excludes the following pages from cache:
- The wp-login.php page
- The wp-admin area
- The staging area
- Pages named cart, checkout, or check-out
- Pages using a set cookie with “wordpress_” in the name
And, when WPEngine detects your website is using the WooCommerce plugin, we add some additional cache exclusions:
- Pages using a set cookie with “woocommerce_items_in_cart=,” “woocommerce_cart_hash,” or “wp_woocommerce_session” in the name.
- URI paths with ?add-to-cart= and ?wc-api= added to the end
- Pages named products-compare, coupons, wp-json/wc, wc-api
https://docs.easydigitaldownloads.com/article/295-wp-engine-cache-exclusion-for-checkout-page
